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Summary of Contents for Wahl Heat Spy DHS520
- Page 1 Wahl Heat Spy® DHS520/520B Port able Infr ar ed Thermometer User Manual Palmer Wahl Inc. 234 Old Weaverville Road Asheville, North Carolina 28804 Telephone: (828) 658-3131 Fax: (828) 658-0728 info@palmerwahl.com www.palmerwahl.com WD1014 Rev B 10/3/07...
- Page 4 User Manual Wahl DHS520 The Quality Management System of Wahl Instruments Inc. is approved for the design, manufacture, and sales of temperature and pressure measuring devices for a variety of industries. This product complies with current European directives relating to electromagnetic compatibility and safety (EMC directive 89/336/EEC;...
- Page 5 Wahl DHS520 User Manual SAFETY INFORMATION SYMBOL PUBLICATION DESCRIPTION Direct IEC 417, No.5031 Current Alternating IEC 417, No.5032 Current Both direct and IEC 417, No.5033 alternating current Three-phase alternating IEC 617-2, No.02-02-06 Current Earth IEC 417, No.5017 (ground) terminal Protective conductor IEC 417, No.5019...
- Page 6 User Manual Wahl DHS520 SAFETY INFORMATION (CONTINUED) SYMBOL PUBLICATION DESCRIPTION WARNING ISO 3864, No. B.3.6 Risk of electric shock Caution ISO 3864, No. B.3.1 Observe precautions for handling electrostatic BS EN 100015 discharge sensitive devices WARNING BS EN 60825-1 Laser Radiation...
- Page 7 Wahl DHS520 User Manual TECHNICAL SUPPORT Technical support for the Wahl DHS520 portable infrared thermometer can be obtained by using the contact details given on the cover of this User Guide or by e-mail at the following address: info@palmerwahl.com .
- Page 8 PRODUCT WARRANTY 12 MONTH WARRANTY Thank you for purchasing your new product from Palmer Wahl. This warranty covers product malfunctions arising from defects in design or manufacture. The warranty period begins on the date product is shipped from the factory in Asheville, NC.
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Page 10: Table Of Contents
User Manual Wahl DHS520 CONTENTS QUALITY ASSURANCE SAFETY INFORMATION TECHNICAL SUPPORT PRODUCT WARRANTY INTRODUCTION General Introduction About Wahl DHS520/520B Portable Thermometers Nomenclature SPECIFICATIONS THERMOMETER DESCRIPTION Wahl DHS520/520B THERMOMETER POWER SUPPLY OPTIONS Using a Battery Using an External Power Source THERMOMETER CONTROLS... - Page 11 OPERATIONAL (TRIGGER) MODES Introduction Classic Mode History Mode Burst Mode THERMOMETER OPERATION Simple temperature measurement Complex temperature measurement 10.0 DATA STREAMING 10.1 Serial Communications 10.2 ‘Bluetooth’ Wireless Comms (Wahl DHS520B) 11.0 EMISSIVITY 11.1 Refractories 11.2 Alloys 11.3 Metals 11.4 Miscellaneous 12.0 MAINTENANCE 13.0...
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Page 13: Introduction
Wahl DHS520/520B portable thermometers. It is important to check all equipment with which you have been supplied, and read all the literature provided with the Wahl DHS520/520B before using the thermometer for the first time. Additionally, keep all supplied literature readily available, for reference when the equipment is in general use. - Page 14 Wahl DHS520 User Manual Fig. 1 Wahl DHS520/520B portable infrared thermometer Page 2...
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Page 15: Nomenclature
Fig. 2 Wahl DHS520/520B portable thermometer nomenclature A second instrument label is positioned on the instrument chassis, in the battery compartment. This label displays the instrument serial number, the unique ‘Bluetooth’ address (Wahl DHS520B variants only) and the recommended battery details. Page 3... -
Page 16: Specifications
Wahl DHS520 User Manual 2.0 SPECIFICATIONS Temperature range: 550 to 3000° C / 1022 to 5432° F (actual) 600 to 3000° C / 1112 to 5432° F (specified) Viewfinder display: 4-digit temperature in 1° steps External display: Peak, Continuous, Average and Valley temperatures... -
Page 17: Thermometer Description
LCD display panel Trigger switch (2 position) Keypad External connection cover Optical focusing ring Tripod mounting hole Protective window Adjustable wrist strap Lens cap Adjustable eyepiece ON/OFF switch Battery compartment cover Fig. 3 Wahl DHS520/520B portable infrared thermometer description Page 5... -
Page 18: Thermometer Power Supply Options
4.0 THERMOMETER POWER SUPPLY OPTIONS 4.1 Using a Battery The Wahl DHS520/520B portable thermometer is designed to be powered by a 9V dry cell battery. A Duracell 6LR61/12232 (or equivalent) battery is supplied with the thermometer. The battery is fitted as follows:... -
Page 19: Using An External Power Source
4.2 Using an External Power Source Although the Wahl DHS520/520B portable thermometer is designed to be powered by an internal battery, it can be powered by a suitable external power source (9 to 12V d.c./100mA rated). -
Page 20: Thermometer Controls
Wahl DHS520 User Manual 5.0 THERMOMETER CONTROLS 5.1 ON/OFF Switch 315008 The On/Off switch is on the left-hand side of the thermometer (see Fig. 3, item 6). The switch has two push buttons, Off (a) and On (b). A single press of the switch will activate/de-activate the unit. -
Page 22: Adjustable Eyepiece
User Manual Wahl DHS520 5.4 Adjustable Eyepiece 315011 The Adjustable Eyepiece (e) is on the rear face of the thermometer (see Fig. 3, item 11). The eyepiece allows you to view the scene being measured by the thermometer. The eyepiece can be adjusted manually to match each user ’s eyesight... -
Page 23: Optics
Wahl DHS520 User Manual 6.0 OPTICS The Wahl DHS520/520B has a precision reflex optical system, which provides user-focusable ‘through the lens’ sighting and gives precise definition of the target spot. The specified focal range is 1m/39.4in to infinity. 6.1 Target Size Calculation The precision reflex optical system gives a narrow field of view (180:1 to 98% energy). -
Page 24: Lens Options
To counter this effect, a dark filter must be fitted in place of the clear protection window. To fit a dark filter to the Wahl DHS520/520B thermometer, unscrew the clear protection window from the lens assembly and replace it with the dark filter. -
Page 25: Eyepiece Optics
315016 Fig. 16 Wahl DHS520/520B Eyepiece Optics The eyepiece allows you to look into the thermometer and view the target scene. Accurate target definition is provided by the wide angle (9° ) field of view and small, clearly defined (1/3° ) target reticule. -
Page 26: Display Panel Modes
User Manual Wahl DHS520 7.0 DISPLAY PANEL MODES 7.1 Introduction The LCD display panel has two basic modes of operation: • Measure Mode • Menu Mode When the thermometer is switched on, an introduction screen is displayed. This screen times-out automatically and is replaced by the Measure Mode display. - Page 27 Wahl DHS520 User Manual 7.2.1 Peak temperature measurement The Peak temperature measurement mode is used to measure and display information about the highest temperatures recorded by the thermometer. The peak temperature values can be viewed in the instrument eyepiece and streamed to the serial or ‘Bluetooth’...
- Page 28 Wahl DHS520 User Manual 7.2.2 Continuous temperature measurement Continuous temperature measurement provides the real-time observed temperature value. The temperature is updated continuously and the value is viewed in the instrument eyepiece. 7.2.3 Averaged temperature measurement Averaged temperature measurement gives a ‘smoothed’ temperature value. To use the averaging function, press and hold down the trigger.
- Page 29 Wahl DHS520 User Manual 7.2.4 Valley temperature measurement Valley temperature measurement is the inverse of Peak temperature measurement, in that it allows you to monitor the lowest temperature value rather than the highest. Temperature measurement starts when the trigger is pressed in and continues until the trigger is released (See Fig.
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Page 30: Menu Mode
7.3 Menu Mode When the thermometer is in Menu Mode, the menu options available in the Wahl DHS520/520B thermometer can be accessed. This allows you to view and configure the setup of the thermometer and select the options that best suit your temperature measurement requirements. -
Page 31: Menu Mode - Icon Descriptions
User Manual Wahl DHS520 7.4 Menu Mode - Icon Descriptions The information in this chapter should be used in conjunction with the navigational flow chart (see Fig. 22). Exit When in Menu Mode, clicking on the exit icon (a) will return you to Measure Mode. - Page 32 Wahl DHS520 User Manual Averager time constant : the averager time constant function allows you to set the rate of averaging of the temperature values taken. There are three options: Fast (i), Mid (j) and Slow (k). The default setting is Mid.
- Page 33 User Manual Wahl DHS520 Sounder This option allows you to either switch on or mute the sounder. When switched on, the sounder indicates trigger operation, alarm trip, active communications response, and lost communications response (Bluetooth). The available sounder options are: Sounder On (s), or Sounder Off (t).
- Page 34 Bluetooth identifier (for Bluetooth models), software version, Tmax and Tmin ambient temperature readings since last calibration and a link to the Palmer Wahl website. Bluetooth Bluetooth communications allow wireless streaming of information from the thermometer to a remote facility.
- Page 35 User Manual Wahl DHS520 Page 22 (Blank)
- Page 36 SCROLL UP SCROLL DOWN PRODUCT INFORMATION ABOUT APPROVALS, CALIBRATION, SERIAL NUMBER, BLUETOOTH IDENTIFIER, SOFTWARE VERSION, AMBIENT TEMPERATURES ENTER (TMAX/TMIN) SINCE LAST CALIBRATION, WEBSITE LINK Bluetooth not fitted BLUETOOTH 315022 Bluetooth fitted Fig. 22 - Wahl DHS520/520B Icon navigational flow chart...
- Page 38 Wahl DHS520 User Guide Page 24 (Blank)
- Page 39 User Manual Wahl DHS520...
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Page 41: Operational (Trigger) Modes
User Manual Wahl DHS520 8.0 OPERATIONAL (TRIGGER) MODES 8.1 Introduction The Wahl DHS520/520B thermometer has three operating modes: • Classic • History • Burst The thermometer trigger is used to control the operation of the thermometer in each T r i g g e r mode. -
Page 42: History Mode
Wahl DHS520 8.3 History Mode In History mode all data collection and transfer is controlled by the dual stage trigger operation. In summary, the T1 position is used to align the instrument on the chosen target and the T2 position is used to generate the logged data. -
Page 43: Burst Mode
User Manual Wahl DHS520 8.4 Burst Mode Burst mode is only intended for use when data logging to an IPAQ or laptop computer. It can be used for monitoring rapid fluctuations of temperature or recording a temperature profile, such as a long strip of material. -
Page 44: Thermometer Operation
Wahl DHS520 User Manual 9.0 THERMOMETER OPERATION CAUTION Never look at the sun through this instrument - this could cause severe damage to the eye. When measuring temperatures above 1200° C/2192° F, a dark filter must be fitted to the lens assembly. -
Page 46: Simple Temperature Measurement
Ensure that Window Compensation is Off. Ensure that the Alarms function is set to Off. Ensure the Bluetooth option is set to Off (Wahl DHS520B variants only). On the side display, select the Continuous temperature measurement option (see Section 7.2). -
Page 47: Complex Temperature Measurement
This can lead to a reduction in the amount of radiant energy reaching the thermometer from the target. The following instructions detail the operation of a Wahl DHS520/520B in a typical complex temperature measurement application (as in Fig. 23). - Page 48 (0.920) Ensure that the Alarms function is set to Off. Ensure the Bluetooth option is set to Off (Wahl DHS520B variants only) Select the Continuous temperature measurement option. Aim the thermometer through the viewing window/port at the target and focus the reticule onto the area under observation.
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Page 49: Data Streaming
Data streaming provides flexibility in the retention of information captured by the thermometer. It can be used in two separate ways: serially or wireless. 10.1 Serial Communications To capture information from the Wahl DHS520 to a laptop/PC/Pocket PC, DA-LOG Datalogger Software must be used. Note The ‘Bluetooth’... -
Page 50: Bluetooth' Wireless Comms (Wahl Dhs520B)
User Manual 10.2 ‘Bluetooth’ Wireless Comms (Wahl DHS520B variants only) To capture information by Bluetooth communication from the Wahl DHS520B to a laptop/PC/Pocket PC, you must use DA-LOG Datalogger Software. Ensure that the datalogging software has been loaded to the PC/laptop or Pocket PC as required. -
Page 52: Emissivity
If you have a query regarding the emissivity of the target in your measurement application, contact Palmer Wahl for assistance. 11.1 Refractories Material... -
Page 53: Alloys
User Manual Wahl DHS520 11.2 Alloys Material Wahl DHS520/520B Brass 0.20 Oxidized 0.70 Chromel & Alumel 0.30 Oxidized 0.80 Constantin & Manganin 0.25 Oxidized 0.65 Inconel 0.30 Oxidized 0.85 Monel 0.25 Oxidized 0.70 Nichrome 0.30 Oxidized 0.85 Fig. 25 Typical Emissivity Values for Alloys... -
Page 54: Metals
Wahl DHS520 User Manual 11.3 Metals Material Wahl DHS520/520B Aluminum 0.13 Oxidized 0.40 Chromium 0.43 Oxidized 0.75 Cobalt 0.32 Oxidized 0.70 Copper 0.06 Oxidized 0.85 Gold 0.05 Iron & Steel 0.35 Oxidized 0.85 Lead 0.35 Oxidized 0.65 Magnesium 0.27 Oxidized 0.80... -
Page 55: Miscellaneous
User Manual Wahl DHS520 11.4 Miscellaneous Material Wahl DHS520/520B Asbestos Board/paper/cloth 0.90 Asphalt 0.85 Carbon Graphite 0.85 Soot 0.95 Cement & Concrete 0.65 Cloth All types - close weave 0.75 (Open weave reduces emissivity) Glass 3mm thick 6mm thick 12mm thick 20mm thick 0.80... -
Page 56: Maintenance
Ensure that a spare, fully charged battery is kept with the thermometer at all times. In the unlikely event of an instrument fault, do not attempt to investigate or repair the fault on-site. Contact Palmer Wahl to arrange a repair. Page 40... -
Page 57: Accessories
13.0 ACCESSORIES 13.1 Accessories Type 110 & Type 135 Close-up Lenses Type 110 (L-110) and Type 135 (L-135) close-up lenses enable the Wahl DHS520/520B to focus on targets at distances that are too close to measure with the standard lens. - Page 58 User Guide Wahl DHS520 Protective Hard Carry Case The Hard Carry Case (DA-WPC) is a rugged, lightweight, waterproof and shockproof injection-molded box, giving full environmental protection. It is supplied with custom-cut foam cushioning, with cut-outs for the thermometer and any supplied accessories, allowing all items of the ‘kit’ to be kept together for convenience.
- Page 59 User Manual Wahl DHS520 Page 43...
- Page 60 Your chosen parameter settings and values are stored in the thermometer’s memory. If the thermometer is returned to Palmer Wahl for repair or recalibration, it is possible that your stored user settings may be overwritten and the thermometer returned to you with the factory default settings.
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Page 61: User Configuration Record
User Manual Wahl DHS520 USER CONFIGURATION RECORD Serial Nº ............. Date: ............. Measurement Mode: Peak Instantaneous Averaged Valley Menu Mode: Emissivity (value) ....Data Output Mode: Classic Historic Burst Alarm Settings: Alarm off High alarm (value) ....Low alarm (value) .... -
Page 62: Appendix
Wahl DHS520 User Manual APPENDIX Serial Communications Data Logging Protocol he logging protocol applies to both the SERIAL PORT and BLUETOOTH module. UART Settings BAUD 57600 fixed START DATA PARITY STOP1,8,N,1 Classic Mode stream When the trigger is pressed to the T1 position, a continuous stream of lines of data of fixed (12 character) length is output every 0.5 ±0.1seconds. - Page 63 User Manual Wahl DHS520 Page 47...
- Page 64 User Manual Wahl DHS520 Advanced Mode - data stream When the trigger is pressed to the T1 position, a continuous stream of lines of data is produced every 0.5 ±0.1seconds: B 1 C I +972.0 CR LF As per Classic Mode stream except...
- Page 65 User Manual Wahl DHS520 Advanced – Bluetooth Heartbeat To maintain the Bluetooth link, and to establish that the logger program is running, the following dummy data can be sent: xxxxxx CR LF The IPAQ should send a * handshake to indicate heartbeat reception.
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